Core box for manufacturing internal core of casting and operation method of core box

Abstract

The invention relates to a core box for manufacturing an internal mold core of a casting and an operation method thereof.The core box comprises a square box body with a cavity inside, the periphery of the exterior of the box body is a plane, and the internal cavity penetrates through the upper top face and the lower bottom face of the whole box body; the whole square box body is formed by splicing a plurality of combined box body units, and the plurality of box body units comprise a main box body and sub box bodies; the main box body and the branch box body are locked through a locking pin assembly, and a prying gasket assembly is arranged at the joint of the main box body and the branch box body; a prying device is inserted into the prying gasket assembly between the main box body and the branch box body; step-by-step splicing sand filling is adopted, and visual sand filling is realized in the sand filling process, so that compact sand filling at the bottom of the core box is ensured when sand filling is carried out on the interior of the high-depth core box of a casting with relatively high height, and more convenience is realized; and the problem that the bottom sand filling condition of the box body cannot be judged due to the large depth in the original half-and-half box body, so that the bottom sand filling is not dense, and the casting quality is influenced is well solved.

Description

Technical Field

[0001] The invention relates to a core box for making an internal core of a casting and an operating method thereof, belonging to the technical field of casting. Background Art

[0002] In the field of casting, for the casting of cylindrical castings with high height, the center position inside the wooden mold is used to fill with molding sand during the production process. When the wooden mold is unpacked, the box is usually divided into two parts in half and the core is taken out. Since the casting is high (about 2 meters), the inside of the box is very deep. When injecting sand from the upper part of the box, people cannot enter the box and need to fill sand from the outside of the box. The inside of the box needs to ensure that the sand is densely filled. It is necessary to observe whether the corners of the bottom are occupied by molding sand. However, due to the great depth of the box, it is impossible to directly judge the sand filling situation; if the sand is not densely filled, it will affect the production of the casting and ultimately lead to unqualified casting quality.

[0003] On the other hand, after the wood mold is filled with sand, it needs to be unpacked and disassembled. Before unpacking, the wood mold is stuck to the core inside. The conventional way to separate the wood mold from the core is to weld a connector that can tighten the screws on the outside of the wood mold, and then use a hammer to hit the screws to make the wood mold vibrate, so that it can be separated from the core through the impact force; but the problem is that the hammer will shatter the sand mold when hitting the wood mold. Summary of the invention

[0004] In view of the technical problems existing in the above-mentioned technology, the purpose of the present invention is to provide a core box for making an internal core of a casting and an operating method thereof, which is convenient for filling sand inside the core box. When filling sand inside a high-depth core box of a relatively high casting, the sand at the bottom of the core box is ensured to be densely filled, thereby ensuring the casting quality of the casting.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a core box for making an internal core of a casting, comprising: a square box body with a cavity inside, the internal cavity of the box body is a cavity for injecting sand; the outer periphery of the box body is flat, and the internal cavity runs through the upper top surface and the lower bottom surface of the entire box body; the entire square box body is assembled by a plurality of combined box body units, and the plurality of box body units include a main box body and a sub-box body; the main box body and the sub-box body are locked by a locking pin assembly, and a prying gasket assembly is provided at the joint between the main box body and the sub-box body; the prying gasket assembly between the main box body and the sub-box body is used to insert a prying device; Furthermore, the sand injection cavity of the square core box is located at the center of the core box, and the molding sand is injected into the cavity to occupy the entire cavity and is used to form the internal core of the casting after pouring; Furthermore, the square core box is made of wood; Further, the plurality of combined box body units are three, including a main box body and two sub-box bodies; the main box body is one half of the entire core box divided by the longitudinal center line; the two sub-box bodies are the other half of the entire core box; the two sub-box bodies are divided into a first sub-box body and a second sub-box body arranged up and down by the axial center line of the other half; Furthermore, the main box body and the second sub-box body at the lower part form a side L-shaped structure when combined; In the above structure, the L-shaped structure formed by the main box body and the second sub-box body forms the first sand filling matrix. When the molding sand is filled into the cavity from the top and the height of the molding sand in the cavity is close to the upper end surface of the second sub-box body, the sand filling is stopped, the sand filling situation is observed and adjusted; after the first sub-box body is assembled above the second sub-box body, the main box body, the first sub-box body and the second sub-box body together form the second sand filling matrix; at this time, the sand is continued to be filled into the cavity from the top until it is full, completing the entire sand filling process; Furthermore, the main box body and the first sub-box body at the upper part, and the main box body and the second sub-box body at the lower part are all locked by a locking pin assembly; Furthermore, the locking pin assembly of the main box body and the first sub-box body comprises: a pin rod, a pin rod mounting plate and a locking washer; the pin rods are provided in two pieces and are located at two opposite outer sides of the core box, and the other two outer sides of the core box are fixedly provided with mutually symmetrical pin rod mounting plates, and the ends of the pin rod mounting plates are provided with pin rod connecting holes; a hand ring is provided at the end of the pin rod, and the front end of the pin rod is passed through a connecting hole at one end of a pin rod mounting plate to a connecting hole at the end of another pin rod mounting plate and fixed by a locking washer, thereby pinning the main box body and the first sub-box body to prevent the core box from loosening during sand filling; Furthermore, the structure of the locking pin assembly between the main box body and the second sub-box body and the arrangement thereof on the entire core box are the same as those of the locking pin assembly between the main box body and the first sub-box body.

[0006] Furthermore, a prying gasket assembly is provided at the connection between the main box body and the first sub-box body, and at the connection between the main box body and the second sub-box body; Further, the prying gasket assembly at the joint between the main box body and the first sub-box body comprises: L-shaped prying gaskets, the L-shaped prying gaskets are fixed in pairs at respective corner positions at the joint between the main box body and the first sub-box body, facing each other, so that one of the surfaces of the two L-shaped prying gaskets is inserted into the joint gap between the main box body and the first sub-box body, and the other surface of the two L-shaped prying gaskets is respectively located on the outer wall surface of the main box body and the first sub-box body; Furthermore, the L-shaped prying gasket is fixedly connected to the main box body or the first sub-box body by screws; Furthermore, the prying gasket is made of iron; In the above structure, the position between the two L-shaped prying gaskets inserted into the joint gap between the main box body and the first sub-box body is the prying point. When the main box body and the first sub-box body need to be separated, the prying device is extended into the prying point between the main box body and the first sub-box body, and the prying device is pried in the direction of the main box body and the direction of the first sub-box body, so that the first sub-box body is separated from the main box body; Furthermore, the prying device adopts a crowbar; Furthermore, the structure of the prying gasket assembly between the main box body and the second sub-box body and the arrangement method on the entire core box are the same as the form of the prying gasket assembly between the main box body and the first sub-box body; therefore, by the same token, the position between the two L-shaped prying gaskets inserted into the connecting gap between the main box body and the second sub-box body is the prying point. When the main box body and the second sub-box body need to be separated, the prying device is extended into the prying point position between the main box body and the second sub-box body, and the prying device is pried in the direction of the main box body and the direction of the second sub-box body, so that the second sub-box body is separated corresponding to the main box body.

[0007] The above-mentioned boxes of the technical solution need to be removed after being separated from the internal core by prying, and the means is that the main box body and the two sub-box bodies are fixed with lifting ring plates for lifting and transporting the boxes after separation; Furthermore, the entire core box is provided with a total of six lifting ring plates, and every three lifting ring plates are distributed on the outer wall surface on the same side around the core box; Furthermore, the lifting ring plate is arranged in the same manner on the main box body, the first sub-box body, and the second sub-box body, and is fixed by screws; Furthermore, the structure of each of the lifting ring plates is the same, which is a long plate-like component with an annular hole at one end; the annular holes of the lifting ring plates are all located above the upper end surface of the main box body, the upper end surface of the first sub-box body and the upper end surface of the second sub-box body, so that the lifting hook can be hooked into the annular hole of the lifting ring plate.

[0008] The core box of the present invention is used to fill sand in the inner core of the casting, and the operation method of loosening and separating the core box and the core is as follows: Sand filling: The core box is filled with sand in steps using a main box body and two sub-box bodies; the first step of sand filling: the main box body and the second sub-box body are combined to form a side L-shaped structure; the L-shaped structure formed by the main box body and the second sub-box body forms the first sand filling matrix, and when the molding sand is filled into the cavity from the top and the height of the molding sand in the cavity is close to the upper end surface of the second sub-box body, the sand filling is stopped; the second step of sand filling: after the first sub-box body is assembled above the second sub-box body, the main box body, the first sub-box body and the second sub-box body jointly form the second sand filling matrix; at this time, continue to fill the cavity with sand from the top until it is full, thereby completing the entire sand filling process; The core box and the core are loose and separated First, separate and remove the main box body from the upper first sub-box body, then separate and remove the main box body from the lower second sub-box body, and finally remove the main box body; The position between the two L-shaped prying gaskets inserted into the joint gap between the main box body and the first sub-box body is the prying point. When the main box body and the first sub-box body need to be separated, the prying device is extended into the prying point between the main box body and the first sub-box body, and the prying device is pried in the direction of the main box body and the direction of the first sub-box body, so that the first sub-box body is loosened and separated from the main box body; after loosening and separation, the first sub-box body is removed by hooking the two lifting ring plates on the first sub-box body with the lifting hook; The position between the two L-shaped prying gaskets inserted into the joint gap between the main box body and the second sub-box body is the prying point. When the main box body and the second sub-box body need to be separated, the prying device is extended into the prying point between the main box body and the second sub-box body, and the prying device is pried in the direction of the main box body and the direction of the second sub-box body, so that the second sub-box body is loosened and separated from the main box body; after loosening and separation, the second sub-box body is removed by hooking the two lifting ring plates on the second sub-box body with the lifting hook; Finally, the lifting hook is used to hook the two lifting ring plates on the main box body, and the main box body is removed, thereby completing the disassembly of the entire core box.

[0009] The core box for making the inner core of a casting and the operation method thereof of the present invention have the beneficial effects of: The multi-box unit combined structure of the present invention is used to assemble and fill sand in steps, and the sand filling process can be visualized, so that when filling sand inside a high-depth core box of a relatively high-height casting, the sand filling at the bottom of the core box is ensured to be dense, which is more convenient and well solves the problem that the sand filling at the bottom of the original half-type box cannot be judged due to the large depth of the box, which may cause the sand filling at the bottom to be not dense and affect the casting quality; At the same time, the core box is specially designed in that the main box body and the two sub-box bodies are respectively pried apart in steps by prying points and then lifted for transportation; this box unpacking method substantially changes the way the core box is separated from the internal core. This solution replaces the vibration impact force with a creeping method, which can avoid the problem of the core being shattered by knocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the core box of the present invention.

[0011] Figure 2 for Figure 1 A-direction view.

[0012] Figure 3 for Figure 1 Top view of the .

[0013] Figure 4 for Figure 1 Detail of point a (the location of the prying gasket).

[0014] Figure 5 for Figure 1 Schematic diagram of point b in the middle (the crowbar is in use to pry at the prying point of the core box).

[0015] In the figure, 1, cavity, 2, main box body, 3, longitudinal center line, 4, axial center line, 5, first sub-box body, 6, second sub-box body, 7, pin rod, 8, pin rod mounting plate, 9, locking gasket, 8.1, pin rod connecting hole, 8.2, wrist ring, 10, L-shaped prying gasket, 11, connecting gap between main box body and first sub-box body, 12, screw, 13, crowbar, 14, lifting ring plate, 15, annular hole. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0017] like Figure 1-5 The core box shown in the figure for making the inner core of the casting comprises: a square box body with a cavity 1 inside, the inner cavity 1 of the box body is a cavity for injecting sand; the outer periphery of the box body is flat, and the inner cavity 1 runs through the upper top surface and the lower bottom surface of the entire box body; the entire square box body is assembled by a plurality of assembled box body units, and the plurality of box body units include a main box body 2 and a sub-box body; the main box body 3 and the sub-box body are locked by a locking pin assembly, and a prying gasket assembly is provided at the joint between the main box body and the sub-box body; the prying gasket assembly between the main box body 2 and the sub-box body is used to insert a prying device; The sand injection cavity 1 of the square core box is located at the center of the core box. The molding sand is injected into the cavity to occupy the entire cavity and is used to form the internal core of the casting after pouring. The square core box is made of wood; There are three multiple combined box body units, including a main box body 2 and two sub-box bodies; the main box body 2 is one half of the entire core box with the longitudinal center line 3 as the boundary; the two sub-box bodies are the other half of the entire core box; the two sub-box bodies are divided into a first sub-box body 5 and a second sub-box body 6 arranged up and down with the axial center line 4 of the other half as the boundary; The main box body 2 and the second sub-box body 6 at the lower part form a side L-shaped structure when combined; In the above structure, the L-shaped structure formed by the main box body 2 and the second sub-box body 6 forms a first sand filling matrix. When the molding sand is filled into the cavity from the top and the height of the molding sand in the cavity 1 is close to the upper end surface of the second sub-box body 6, the sand filling is stopped, the sand filling situation is observed and adjusted; after the first sub-box body 5 is assembled above the second sub-box body 6, the main box body 2, the first sub-box body 5 and the second sub-box body 6 together form a second sand filling matrix; at this time, the sand is continued to be filled into the cavity from the top until it is full, completing the entire sand filling process; The sand filling is carried out in steps by using the sand filling bases of different shapes as mentioned above. Since the height of the second sub-box body 6 in the L-shaped structure of the first sand filling base is relatively low, an observation port for the entire core box is formed through the upper end of the second sub-box body 6 (the space where the first sub-box body 5 is located); therefore, the sand filling is easy to observe, and the sand filling operation can be adjusted and controlled according to the situation to ensure that the sand is densely filled at the bottom of the cavity and the quality is guaranteed; then the first sub-box body 5 is assembled to form a complete square integral core box, and then the next stage of sand filling is carried out. Compared with directly filling the integral core box with sand, this method is more convenient and faster, and the sand filling efficiency is improved.

[0018] The main box body 2 and the upper first sub-box body 5, and the main box body 2 and the lower second sub-box body 6 are all locked by a locking pin assembly; The locking pin assembly of the main box body 2 and the first sub-box body 5 comprises: a pin rod 7, a pin rod mounting plate 8 and a locking gasket 9; the pin rod 7 is provided in two pieces and is located at two opposite outer sides of the core box, and the other two outer sides of the core box are fixedly provided with mutually symmetrical pin rod mounting plates 8, and the ends of the pin rod mounting plates 8 are provided with pin rod connecting holes 8.1; a hand ring 8.2 is provided at the end of the pin rod 7, and the front end of the pin rod 7 is passed through the connecting hole 8.1 at one end of one pin rod mounting plate 8 to the connecting hole 8.1 at the end of the other pin rod mounting plate 8 and is fixed by the locking gasket 9, so that the main box body 2 and the first sub-box body 5 are pinned tightly, so as to prevent the core box from loosening during the sand filling process; The structure of the locking pin assembly between the main box body 2 and the second sub-box body 6 and the arrangement method on the entire core box are the same as the form of the locking pin assembly between the main box body 2 and the first sub-box body 5.

[0019] In this solution, a prying gasket assembly is provided at the connection between the main box body 2 and the first sub-box body 5, and at the connection between the main box body 2 and the second sub-box body 6; The prying gasket assembly at the connection between the main box body 2 and the first sub-box body 5 includes: L-shaped prying gaskets 9, and the L-shaped prying gaskets 9 are fixed in pairs at respective corner positions at the connection between the main box body 2 and the first sub-box body 5, facing each other, so that one of the surfaces of the two L-shaped prying gaskets 9 is inserted into the connection gap 10 between the main box body and the first sub-box body, and the other surface of the two L-shaped prying gaskets 9 is respectively located on the outer wall surface of the main box body 2 and the first sub-box body 5; The L-shaped prying gasket 9 is fixedly connected to the main box body 2 or the first sub-box body 5 by screws 11; The prying gasket 9 is made of iron. Since the core box is made of wood, the core box is easily damaged when the prying device pries the core box. Therefore, the iron prying gasket is used to prevent the prying device from damaging the core box and protect the core box. In the above structure, the position between the two L-shaped prying gaskets 9 inserted into the joint gap 10 between the main box body and the first sub-box body is the prying point. When the main box body 2 and the first sub-box body 5 need to be separated, the prying device is extended into the prying point between the main box body 2 and the first sub-box body 5, and the prying device is pried in the direction of the main box body 2 and the direction of the first sub-box body 5, so that the first sub-box body 5 is separated from the main box body 2. The prying device adopts a crowbar 12; The structure of the prying gasket assembly between the main box body 2 and the second sub-box body 6 and the arrangement method on the entire core box are the same as the form of the prying gasket assembly between the main box body 2 and the first sub-box body 5; they will not be repeated here.

[0020] The above-mentioned box bodies of the present technical solution need to be removed after being pried apart from the internal core, and the means therefor lies in that a lifting ring plate 13 is fixedly provided on the main box body 2 and the two sub-box bodies; a total of six lifting ring plates 13 are arranged on the entire core box, and every three lifting ring plates 13 are distributed on the outer wall surface on the same side around the core box; the lifting ring plates 13 are arranged in the same manner on the main box body 2, the first sub-box body 5, and the second sub-box body 6, and are all fixed by screws 11; the structure of each of the lifting ring plates 13 is the same, which is a long strip of plate-like component with an annular hole 14 at one end; the annular hole 14 of the lifting ring plate 13 is located above the upper end surface of the main box body 2, the upper end surface of the first sub-box body 5, and the upper end surface of the second sub-box body 6.

[0021] The core box of the present invention is used to fill sand in the inner core of the casting, and the operation method of loosening and separating the core box and the core is as follows: Sand filling: the core box is filled with sand in steps using the main box body 2 and two sub-box bodies; the first step of sand filling: the main box body 2 and the second sub-box body 6 are combined to form a side L-shaped structure; the L-shaped structure formed by the main box body 2 and the second sub-box body 6 forms a first sand filling matrix, and when the molding sand is filled into the cavity from the top and the height of the molding sand in the cavity is close to the upper end surface of the second sub-box body 6, the sand filling is stopped; the second step of sand filling: after the first sub-box body 5 is assembled above the second sub-box body 6, the main box body 2, the first sub-box body 5 and the second sub-box body 6 together form a second sand filling matrix; at this time, continue to fill the cavity with sand from the top until it is full, thereby completing the entire sand filling process; The core box and the core are loose and separated First, separate and remove the main box body 2 from the upper first sub-box body 5, then separate and remove the main box body 2 from the lower second sub-box body 6, and finally remove the main box body 2; The position between the two L-shaped prying gaskets 9 inserted into the joint gap 10 between the main box body and the first sub-box body is the prying point. When the main box body 2 and the first sub-box body 5 need to be separated, the prying device is extended into the prying point between the main box body 2 and the first sub-box body 5, and the prying device is pried in the direction of the main box body 2 and the direction of the first sub-box body 5, so that the first sub-box body 5 is loosened and separated corresponding to the main box body 2; after the loosening and separation, the two lifting ring plates 13 on the first sub-box body 5 are hooked by the lifting hook to remove the first sub-box body 5; The position between the two L-shaped prying gaskets 9 inserted into the joint gap between the main box body and the second sub-box body is the prying point. When the main box body 2 and the second sub-box body 6 need to be separated, the prying device is extended into the prying point between the main box body 2 and the second sub-box body 6, and the prying device is pried in the direction of the main box body 2 and the direction of the second sub-box body 6, so that the second sub-box body 6 is loosened and separated corresponding to the main box body 2; after loosening and separation, the two lifting ring plates 13 on the second sub-box body 6 are hooked by the lifting hook to remove the second sub-box body 6; Finally, the two lifting ring plates 13 on the main box body 2 are hooked by the lifting hook to remove the main box body 2, thereby completing the disassembly of the entire core box.

Claims

1. A core box for making an internal core of a casting, characterized in that: include: A square box body with an internal cavity, wherein the internal cavity of the box body is a cavity for sand injection; the outer periphery of the box body is flat, and the internal cavity runs through the entire upper top surface and lower bottom surface of the box body; the entire square box body is assembled by a plurality of modular box body units, and the plurality of box body units include a main box body and a sub-box body; the main box body and the sub-box body are locked by a locking pin assembly, and a prying gasket assembly is provided at the joint between the main box body and the sub-box body; the prying gasket assembly between the main box body and the sub-box body is used to insert a prying device.

2. The core box for making the inner core of a casting according to claim 1, characterized in that: There are three multiple combined box body units, including a main box body and two sub-box bodies; the main box body is one half of the entire core box divided by the longitudinal center line; the two sub-box bodies are the other half of the entire core box; the two sub-box bodies are divided into a first sub-box body and a second sub-box body arranged upper and lower by the axial center line of the other half.

3. The core box for making the inner core of a casting according to claim 2, characterized in that: The main box body and the second sub-box body at the lower part form a side L-shaped structure when combined.

4. The core box for making the inner core of a casting according to claim 2, characterized in that: The main box body and the upper first sub-box body, and the main box body and the lower second sub-box body are all locked by a locking pin assembly; the locking pin assembly of the main box body and the first sub-box body comprises: a pin rod, a pin rod mounting plate and a locking gasket; the pin rod is provided with two, which are located at two opposite outer sides of the core box, and the other two outer sides of the core box are fixed with mutually symmetrical pin rod mounting plates, and the ends of the pin rod mounting plates are provided with pin rod connecting holes; a wrist ring is provided at the end of the pin rod, and the front end of the pin rod is passed through the connecting hole at one end of a pin rod mounting plate to the connecting hole at the end of the other pin rod mounting plate and is fixed by the locking gasket, thereby pinning the main box body and the first sub-box body; the locking pin assembly structure of the main box body and the second sub-box body and the arrangement method on the entire core box are the same as the form of the locking pin assembly of the main box body and the first sub-box body.

5. The core box for making the inner core of a casting according to claim 2, characterized in that: A prying gasket assembly is arranged at the connection between the main box body and the first sub-box body, and at the connection between the main box body and the second sub-box body.

6. The core box for making the inner core of a casting according to claim 5, characterized in that: The prying gasket assembly at the connection between the main box body and the first sub-box body includes: L-shaped prying gaskets, and the L-shaped prying gaskets are fixed in pairs at respective corner positions at the connection between the main box body and the first sub-box body with their backs to each other, so that one of the surfaces of the two L-shaped prying gaskets is inserted into the connection gap between the main box body and the first sub-box body, and the other surface of the two L-shaped prying gaskets is respectively located on the outer wall surface of the main box body and the first sub-box body.

7. The core box for making the inner core of a casting according to claim 6, characterized in that: The L-shaped prying gasket is fixedly connected to the main box body or the first sub-box body by screws.

8. The core box for making the inner core of a casting according to claim 6, characterized in that: The structure of the prying gasket assembly between the main box body and the second sub-box body and the arrangement method on the entire core box are the same as the form of the prying gasket assembly between the main box body and the first sub-box body.

9. The core box for making the inner core of a casting according to claim 2, characterized in that: The main box body and the two sub-box bodies are all fixedly provided with lifting ring plates.

10. A method for operating a core box according to any one of claims 1 to 9, characterized in that: The steps for filling sand in the core box and loosening and separating the core box and the core when making the internal core of the casting are: Sand filling: The core box is filled with sand in steps using a main box body and two sub-box bodies; the first step of sand filling: the main box body and the second sub-box body are combined to form a side L-shaped structure; the L-shaped structure formed by the main box body and the second sub-box body forms the first sand filling matrix, and when the molding sand is filled into the cavity from the top and the height of the molding sand in the cavity is close to the upper end surface of the second sub-box body, the sand filling is stopped; the second step of sand filling: after the first sub-box body is assembled above the second sub-box body, the main box body, the first sub-box body and the second sub-box body jointly form the second sand filling matrix; at this time, continue to fill the cavity with sand from the top until it is full, thereby completing the entire sand filling process; The core box and the core are loose and separated: First, separate and remove the main box body from the upper first sub-box body, then separate and remove the main box body from the lower second sub-box body, and finally remove the main box body; The position between the two L-shaped prying gaskets inserted into the joint gap between the main box body and the first sub-box body is the prying point. When the main box body and the first sub-box body need to be separated, the prying device is extended into the prying point between the main box body and the first sub-box body, and the prying device is pried in the direction of the main box body and the direction of the first sub-box body, so that the first sub-box body is loosened and separated corresponding to the main box body; After loosening and separation, hook the two lifting ring plates on the first sub-box body with the lifting hook to remove the first sub-box body; The position between the two L-shaped prying gaskets inserted into the joint gap between the main box body and the second sub-box body is the prying point. When the main box body and the second sub-box body need to be separated, the prying device is extended into the prying point between the main box body and the second sub-box body, and the prying device is pried in the direction of the main box body and the direction of the second sub-box body, so that the second sub-box body is loosened and separated corresponding to the main box body; After loosening and separation, hook the two lifting ring plates on the second sub-box body with the lifting hook to remove the second sub-box body; Finally, the lifting hook is used to hook the two lifting ring plates on the main box body, and the main box body is removed, thereby completing the disassembly of the entire core box.

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